Every voice clear, every episode ready to publish.
Gain Curve levels your episode the way an engineer rides a fader: the quiet guest comes up, the laugh doesn't jump out, and nothing pumps. Then it cleans it up, cuts the ums, and gets the file ready for Apple Podcasts and Spotify. It runs on your Mac; nothing is uploaded, and there's no subscription.
What it does for a podcast
- Voice mode. Open a recording and Gain Curve hears that it's speech: the window shows the tools for voices, with presets for a solo show, an interview, a voice memo, an audiobook or film dialog.
- Even voices. Make it ready draws a level curve over the whole episode, line by line, and smooths it. You can see it, and change any spot by drawing.
- Cut ums, coughs and long pauses from the text. Gain Curve writes down what's said, on your Mac, and strikes out every "um" and "uh" it can cut cleanly, plus coughs and throat clears. To cut any other words, select them and press Delete. Joins leave the speaker's own pause, or a tight one if you like a brisker pace. English only; the speech model is a one-time download of 488 MB (or 148 MB for the faster one).
- One file per speaker. Recorded with a track for each person? Open them together: every voice is brought to the same loudness, and each mic is turned down while its person is quiet, so the other voices bleeding into it, its room and its breathing drop away. When two people talk at once, both stay up. Export can save each speaker's track too.
- A clearer voice. Voice tone evens out the voice's own sound (less rumble and boxiness, more clarity and air), as natural, warm, bright or broadcast, or matched to an episode you like. The loudness doesn't change.
- Room echo, noise, clicks and pops. Echo turns down the ringing of a bare room; background hiss is taken out where it's heard; mouth clicks and P and B pops are fixed only where they happen.
- Ready for Apple Podcasts. Matched to −16 LUFS with peaks under −1 dBTP. A mono file lands at −19, which sounds as loud as −16 in stereo.
- The file podcast apps want. Export starts with where it's going. Podcast apps gives an MP3 at podcast size (96 kbps mono, or 128 stereo, or 64 mono) with the title, show, host, episode number, cover art and the chapters you mark on the waveform. AAC and WAV are there too.
- Video podcasts. Open the .mp4 or .mov and the picture plays beside the waveform. Export saves the same video with the new sound: the picture isn't re-encoded and stays in sync. Or tick jump cuts, and the transcript's cuts are made in the picture too.
- Shorter pauses, if you like. Pauses longer than 1.5 s can be shortened at export, and the chapters move with them.
How it fits your workflow
Record as you do now. Open the file (or the speaker tracks) in Gain Curve, press Make it ready, listen, cut what you don't want from the transcript, and export the MP3 for your host. In a DAW, Gain Curve is also an Audio Unit and VST3 plug-in for the levelling and loudness; the voice tools are in the app.
For repeat tasks, use Gain Curve with Shortcuts, the command line or Claude.
Price
$29 once, for the Mac app and both plug-ins, on two computers. No hours to count, no monthly plan. Try everything free for 14 days.
$29 until December 31, then $49.
Compared with other tools: Auphonic · Adobe Podcast. Guides: guest quieter than the host · podcast too quiet · room echo